python 3.x - how to find exponential weighted moving average using dataframe.ewma?

Question

Previously I used the following to calculate the ewma

dataset['26ema'] = pd.ewma(dataset['price'], span=26)

But, in the latest version of pandas pd.ewma has been removed. How to calculate using the new method dataframe.ewma?

dataset['26ema'] = dataset['price'].ewma(span=26)

This is giving an error 'AttributeError: 'Series' object has no attribute 'ewma'

Answer 1

Use Series.ewm:

dataset['price'].ewm(span=26)

See GH11603 for the relevant PR and mapping of the old API to new ones.

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Minimal Code Example

s = pd.Series(range(5))
s.ewm(span=3).mean()

0    0.000000
1    0.666667
2    1.428571
3    2.266667
4    3.161290
dtype: float64